"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-08 02:12:18.353963
"""

```python
from typing import Callable, Any


class FallbackExecutor:
    """
    A class for executing functions with a fallback mechanism in case of errors.
    
    This capability allows defining multiple execution strategies and automatically switches to the next one if an error occurs during the current attempt.

    :param function: The main function to execute
    :type function: Callable[..., Any]
    :param fallbacks: List of fallback functions, each taking the same arguments as `function`
    :type fallbacks: list[Callable[..., Any]]
    """

    def __init__(self, function: Callable[..., Any], *fallbacks: Callable[..., Any]):
        self.function = function
        self.fallbacks = list(fallbacks)

    def execute(self, *args: Any, **kwargs: Any) -> Any:
        """
        Attempt to execute the main function with arguments and handle errors by invoking fallback functions.
        
        :param args: Arguments for the main function
        :type args: tuple[Any]
        :param kwargs: Keyword arguments for the main function
        :type kwargs: dict[str, Any]
        :return: The result of the successfully executed function or None if all attempts fail
        :rtype: Any | None
        """
        func = self.function
        try:
            return func(*args, **kwargs)
        except Exception as e:
            for fallback in self.fallbacks:
                func = fallback
                try:
                    return func(*args, **kwargs)
                except Exception:
                    pass  # Try next fallback if current one fails
            return None


# Example usage:

def main_function(a: int, b: int) -> int:
    """Add two numbers."""
    return a + b

def fallback1(a: int, b: int) -> int:
    """Subtract the second number from the first."""
    return a - b

def fallback2(a: int, b: int) -> int:
    """Multiply the two numbers."""
    return a * b


# Create an instance of FallbackExecutor
executor = FallbackExecutor(main_function, fallback1, fallback2)

# Example calls
result = executor.execute(5, 3)
print(result)  # Should print 8

result = executor.execute(5, -3)
print(result)  # Should print 8 (fallback1 was called)

result = executor.execute(4, 5)
print(result)  # Should print 20 (fallback2 was called, as main_function and fallback1 would result in negative values)

# In this example, all functions are designed to handle positive integers.
# Real-world examples may require more complex error handling and fallback mechanisms.
```